Roller-bearing.



G. A. JOHNSON. noLLEn [1E/mms.

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parrain s'rarns PATENT orricn.

GEGRGE A. JHISDN, 0F CHI-UAGQ, ILLINOIS, ASSIGNOR I WILLIAM MNER, 0F CHAZY, NEW YORK.

nonnen-esserne.

Application led February 16, 1918.

a citizen or the United States, residing at Chicago, in the county of Cook and State cgt illinois, have invented a certain new and j i @tui improvement in Roller-Bearings, of which the following is a full, clear, concise, and exact description, reference beinef had to the accompanyinn` drawings, forming a part ot this speeilication.

This invention relates to improvements in roller bearings. Y' t ln the operation of rolling stock and more particularly steam roads, it is customary `to provide anti-friction roller side bearings between the truck and body bolsters of the cars to minimize the friction when the trucks swivel or swing relatively to the car bodies as the cars pass over curved portions of the tracks, and tor the further purpose ot preventing undue tilting or swaying of the car bodies when the cars strike a curve or pass trom a curve to a tangent. Due to the wear on the engaging parts of the body and truck holsters of the cars and also due to distortion which sometimes occurs, it has been found necessary or desirable in a great many instances to provide means in the roller side bearings to compensate for the changing conditions resulting from the wear or distortion above mentioned. l-leretofore, so far as l am aware, the general practice in thus compensating for the variable conditions mentioned, has been to mount the anti-tric-` tion roller or rollers either in a cradle or an equivalent manner in such a way that the roller could adjust itself bodily about an axis transverse to the bolster on which it is mounted. As will be apparent, this involves extra parts with consequent increased cost of manufacture.

An object of my invention is to provide an antifriction roller suitable tor side bearings of railway cars, which consists of a minimum number of parts and wherein means are provided for compensating for the variable conditions above indicated without employing any rockable or adjustable mounting for the anti-friction roller,

Another and more specific object of the invention, is to provide a roller Side bearing tor railway cars wherein the roller is rotatable about a relatively fixed axis and which is so designed to cooperate with a bearing plate on the opposed bolster that variations Speecation of Letters Patent.

Ao'lI laterally extended ears 20 'Patented Jan. t?, Milli.

serial no. air/,sea i in the relation ot the opposed holsters will be accommodated by the rollerlbearing wlthout necessitating any adj ustment ot the antiiiriction roller itself. j

ln the drawings yfornnng a part, ot this specification, Figure i is a vertical, sectional rien', taken transversely oi the body and truck holsters ot' a` railwa' car showin@ m improvements in connection therewith.A Fig.

is a vertical sectional view, taken substantially on the line 2--2 et Fig. l. And Fig. 3 L:

is a bottom plan view ot the upper bearing plate employed with my improved side bearf mg; i l i .lin said drawing, l0 denotes the bottom wall of a bodybolster rot a car and 1l the upper wall of a truck bolster; proved side bearing includes a, base casting A; an anti-friction roller B; and a coperating bearing plate C. v

The base casting A, as shown, is in .the form of a hollow rectangular box or frame having a `lower wall 12 provided with suitable .flanges lby which it can be riveted to the truck bolster; upwardly extending end walls 14e-4t suitably recessed at the bottom,

foreign matter to be washed out; and parallel side walls 16-16.

The anti-friction roller B has its bearing surface convex, as indicated at 17, the roller B being mounted on a fixed axle orjournal 18 supported in the side walls lli-w16 of the as indicatedr at l5, to permit dirt and other i casting- A, said axle 18 being held against;

accidental displacement by any suitable means, such as a cotter 19 carried by a pair of the casting A.

9.() on one side i rl`he bearing plate C is alsopreferably in`- the form of a casting adapted to be riveted to the upper or bodv bolster l0, said bearing plate C havinnr end lugs Ql-Ql by which it may be so riveted. The bearing plate C is curved lengthwise, as clearly indicated in Fig. 3, on a radius corresponding to the distance from said bearing plate to the kingpin by which the body and truck holsters are usually connected. @n its under face, the bearing` plate C is made concave as clearly indicated at 2'2 in Fig. 2, the radins of said concave surface Q2 being the same as the radius defining the convex bearing surface 17 of the roller ll.

ln normal position of the parts` there is a slight space left between the roller B and the bearing plate C, as clearly illustrated in Fig. 2. When the two holsters approach eac-h other due to the car changing its direction of motion or as the car body sways, it is evident that the roller and hearing plate C will come into engagement, and due to the fact that the bearing surfaces of the roller and plate are struck with equal radii, there will he complete contact between the roller and the bearing plate foi` the full width of the roller. The length (not the radius) of theare of the concave hearing surface 22 is somewhat greater than the length (not the radius) of the arc of the `bearing surface 17 of the roller so that, as

the angular relation between the'holsters 10 and l1 varies due to wear -or distortion of any of the car parts, there will also remain a full contact between the roller and the bearing plate' C, the action being the same as though the bearing plate C were tted onthe roller B and shifted lthereon about a horizontal axis perpendicular to the axis of the axle 18. In this manner, I obtain the same 'effect asis obtained by those roller side hearings lnow o n the market which employ a rockable cradleor mounting for the anti-frictionrolle'r, and itis obvious that my structure is much simpler,- comprises fewer parts, less likely to get out of order,

and ismuchv cheaper both in first cost and in maintenance.

Although I havelierem shown and described what I now consider the preferred manner of carrying out the invention, the

same is merely illustrative `and I conteinplate all changes and modifications that come within the scope of the claims appended hereto.

1. In roller bearing adapted for use between two members relatively rockably mounted; the combination with a retaining casting in which said roller is rotatably mounted, said retaining casting being adapted tohe secured to one of said members; and a bearing surface on the other of said members, said hearing surface being curved about the same axis as that aboutwhich the two members are adapted to rotate relatively7 said hearing surface for the cooperating engaging surface of the roller being complementally curved in transverse section to thereby insure full contact between the roller and the bearing surface.

2. In a roller bearing adapted to be mounted between the body and truck holsters of a car; the combination with a retaining member adapted to be secured to one of said holsters; of an anti-fri tion roller rotatably mounted in said retaining member about a relatively fixed axis, said roller having a bearing surface curved transversely thereof; and a bearing surface on the other of said holsters, said bearing surface beingr curved transversely thereof to correspond with and fit the hearing surface of said roller.

3. In a roller bearing adapted for use hetween body and trui k holsters of a car; the combination with a retaining member adapted to he secured to one of said holsters; au anti-friction roller rotatably mounted in said retaining member about a relatively xed axis, said roller having the bearing surface thereof convexed` transversely; of a bearing surfaceon the other of said holsters,

said bearing surface bein-g concaved transversely and adapted to lit said convex surface of the roller.

1l. In a roller side hearing for railway cars, the combination with a base casting adapted to be secured to one of the car holsters;` of an anti-friction roller rotatably mounted in said base casting about a relatively ixed axis, said roller having the bearing surface convexed transversely thereof; of a hearing plate adapted to he secured to the opposed car bolster, ,said hearing plate heilig curved longitudinally on a radius corresponding to the distance from said bearing plate to the pivotal connection of the car holsters, said hearing plate heilig also curved transversely thereof to lit said curved i hearing surface of the roller.

In witness that I claim the foregoing I have hereunto subscribed my name this 7th day of Feb., 1918.

GEORGE A. JOHNSON.

Copies of this patent-may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

